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The Brembo GP4-RB is a two-piece radial-mount front brake caliper with 30mm and 34mm pistons and a 108mm mounting pitch. It is a race-derived monobloc-style caliper built for sport and track bikes, with an anodized black finish and the Brembo logo. Its staggered piston sizes give a progressive, controllable lever feel, and the aluminum body keeps weight down compared with stock cast calipers. Riders who want sharper initial bite and better heat management than an OEM caliper get a proven upgrade, though it is a serious part that needs the right master cylinder, lines and pads to work well.
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Owners and track riders rate the GP4-RB for strong, consistent stopping power and a precise lever feel. Many say the staggered pistons make modulation easier than stock calipers. Some note the cost of the full conversion and the need to match the master cylinder.
This is the right-side Brembo 30/34 GP4-RB two-piece radial caliper for a motorcycle's front brakes. It mounts radially on 108 mm fixing centers and has 30 mm and 34 mm pistons. The piston configuration gives a progressive, controllable braking feel.
The body is machined from billet aluminium alloy with a hard anodized finish. The design dissipates heat to reduce brake fade. HH-rated sintered brake pads come with the caliper.
Verify compatibility with your motorcycle model before purchasing.
